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wiill
Aspiring Contributor
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Message 1 of 28

Requesting Interleaving turned off

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What is the best way to go about having interleaving turned off? I have tried speaking to support and they are very reluctant to do so - asking me strange questions such as who is suggesting that I do this etc..

 

I have always done this when I have lived in a house with BT broadband, and suddenly it's got a lot harder to do....

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Keith_Beddoe
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Message 2 of 28

Re: Requesting Interleaving turned off

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Welcome to this user forum.

 

Interleaving would have been applied to reduce the number of uncorrected errors on the line. Uncorrected errors reduce your download speed and place extra load on the BT Infrastructure, because information has to be resent.

 

Interleaving adds Forward Error Correction which provides a means to correct some errors at the receiving end.

 

Which BT Home hub are you using?

 

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wiill
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Message 3 of 28

Re: Requesting Interleaving turned off

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 Thanks Keith - I've attached information from my router below - I hope this helps:

 

1. Product name:BT Home Hub
2. Serial number:+068341+NQ33044367
3. Firmware version:Software version 4.7.5.1.83.8.130.1.32 (Type A) Last updated 09/11/16
4. Board version:BT Hub 4A
5. ADSL uptime:3 days, 13:30:44
6. Bandwidth:1128 / 14357
7. Data sent/received:3.2 GB / 52.5 GB
8. Broadband username:bthomehub@btbroadband.com
9. BT Wi-fi:Yes
10. 2.4 GHz Wireless network/SSID:Obi Wlan Kenobi
11. 2.4 GHz Wireless connections:Enabled (802.11 b/g/n (up to 144 Mb/s))
12. 2.4 GHz Wireless security:WPA and WPA2
13. 2.4 GHz Wireless channel:Automatic (Smart Wireless)
14. 5 GHz Wireless network/SSID:Obi Wlan Kenobi 5Ghz
15. 5 GHz Wireless connections:Enabled (802.11 a/n (up to 300 Mb/s))
16. 5 GHz Wireless security:WPA2
17. 5 GHz Wireless channel:Automatic (Smart Wireless)
18. Firewall:Default
19. MAC Address:cc:33:bb:b0:55:54
20. VPI/VCI:0 / 38
21. Modulation:G.992.5 Annex A
22. Latency type:Interleaved
23. Software variant:-
24. Boot loader:-
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Keith_Beddoe
Distinguished Sage
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Message 4 of 28

Re: Requesting Interleaving turned off

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Thanks.

Unfortunately that does not give the information required.

 

Is there an additional option that gives information like noise margin?

 

Log in to the router and go to "Troubleshooting", choose "Event Log", and Category "WAN". You'll find something like this from the last time your line synched:

22:04:23, 09 Aug. ( 105.560000) DSL is up
22:04:22, 09 Aug. ( 104.640000) DSL noise margin: 5.90 dB upstream, 6.00 dB downstream
22:04:21, 09 Aug. ( 103.730000) DSL line rate: 1151 Kbps upstream, 14616 Kbps downstream
I have a feeling that the error statistics are not available on the home hub 4, so its not possible to see why interleaving may have been applied.
There is no real reason to want interleaving removed, and its likely to make your connection worse if there are errors on the line.

 

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wiill
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Message 5 of 28

Re: Requesting Interleaving turned off

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Hi Keith

 

I want to reduce my latency- it's something I've always done for the last 10 years if I've had BT, with no issue. It's even on BT's information as something that can be done - I found some information below:

 

14:34:02, 06 Jan.(398942.860000) DSL noise margin: 6.00 dB upstream, 3.00 dB downstream
14:34:01, 06 Jan.(398941.950000) DSL line rate: 1152 Kbps upstream, 14357 Kbps downstream
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NeilO
Moderator
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Message 6 of 28

Re: Requesting Interleaving turned off

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@wiill Please use the 'click here to contact the mods' link in my forum profile to send in your details and we'll be happy to help. You can find the link by clicking on my username.

Thanks

Neil

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wiill
Aspiring Contributor
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Message 7 of 28

Re: Requesting Interleaving turned off

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Thanks Neil - will do this now

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Keith_Beddoe
Distinguished Sage
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Message 8 of 28

Re: Requesting Interleaving turned off

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@wiill wrote:

Hi Keith

 

I want to reduce my latency- it's something I've always done for the last 10 years if I've had BT, with no issue. It's even on BT's information as something that can be done - I found some information below:

 

14:34:02, 06 Jan. (398942.860000) DSL noise margin: 6.00 dB upstream, 3.00 dB downstream
14:34:01, 06 Jan. (398941.950000) DSL line rate: 1152 Kbps upstream, 14357 Kbps downstream

As the noise margin is quite low, I would expect to see an increase in errors if inteleaving is removed. That is likely to make things worse unless you have good line conditions.

 

Excessive latency can be cause by using a wireless connection, instead of an Ethernet connection. Interleaving at maximum depth, only adds about 40ms, this is tiny compared with latency over the Internet as a whole.

 

See how it goes when its removed. You may initially see latency appear to get worse, as the CRC errors increase to a point where the home hub restarts. Over a period of time, DLM is likely to reduce the connection speed, thus increasing the noise margin to stabilise the line to reduce errors.

 

 

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wiill
Aspiring Contributor
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Message 9 of 28

Re: Requesting Interleaving turned off

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Hi Keith - I'm on a wired connection and spend a lot of time gaming, so the increased latency does affect me negatively quite badly.

 

Many thanks for your help - hopefully it will get removed and I can have a look at how things perform.

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john46
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Message 10 of 28

Re: Requesting Interleaving turned off

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Please be aware that interleaving may be re applied if the DLM considers it necessary to stabilise the connection in addition to the noise margin increase the Keith has mentioned
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